/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intel.oap.spark.sql.execution.datasources.v2.arrow

import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.connector.read.{Scan, SupportsPushDownFilters}
import org.apache.spark.sql.execution.datasources.PartitioningAwareFileIndex
import org.apache.spark.sql.execution.datasources.v2.FileScanBuilder
import org.apache.spark.sql.sources.Filter
import org.apache.spark.sql.types.StructType
import org.apache.spark.sql.util.CaseInsensitiveStringMap

case class ArrowScanBuilder(
    sparkSession: SparkSession,
    fileIndex: PartitioningAwareFileIndex,
    schema: StructType,
    dataSchema: StructType,
    options: CaseInsensitiveStringMap)
    extends FileScanBuilder(sparkSession, fileIndex, dataSchema)
    with SupportsPushDownFilters {

  private var filters: Array[Filter] = Array.empty
  private lazy val pushedArrowFilters: Array[Filter] = {
    filters // todo filter validation & pushdown
  }

  override def pushFilters(filters: Array[Filter]): Array[Filter] = {
    this.filters = filters
    this.filters
  }

  override def pushedFilters: Array[Filter] = pushedArrowFilters

  override def build(): Scan = {
    ArrowScan(
      sparkSession,
      fileIndex,
      readDataSchema(),
      readPartitionSchema(),
      pushedFilters,
      options)
  }
}
